Accounts Receivable and Unbilled Accounts Receivable (Schedule of Accounts Receivable) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	$ 6,980,596	$ 7,009,252
Less: allowances for doubtful accounts	(30,043)	(76,886)
Accounts receivable, net	6,950,553	6,932,366
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	2,173,014	2,546,268
Government [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	$ 4,807,582	$ 4,462,984